About this item BUILT-IN 6 HOURS AUTOMATIC TIMER - Come on the same time each night. For example, if you turn the lights on at 17:00, it will work 6 hours and turn off automatically on 23:00 and will light again in the next 17:00. Save the trouble to turn the lights on and off every day. Set it and forget it! BATTERY OPERATED & 100 HOURS LONG LASTING - Powered by 1 x AAA battery per string (not included), offers 100 hours constant lighting. Tighten or Loosen the cork bottom to turn the lights ON/OFF. No plug in, no need outlet! Perfect for decorating throughout a whole party event or ceremony. UNIVERSAL CORK SIZE FITS FOR VARIOUS BOTTLES - The cork bottom: 0.8 in (22 mm) in diameter and the cork top: 0.59 in (15 mm) in diameter. A wonderful way to recycle your wine bottles, glass liquor bottles, whiskey/champagne/tequila bottles, soda/beer bottles and other bottles. Add more creativity to your daily life and change them into beautiful bottles decor lights. FLEXIBLE COPPER WIRE LIGHTS FOR DIY APPLICATION - Each string is made of 6.6ft silver coated copper wire with 20 bright warm white mini leds, which is flexible and bendable to fit any DIY shape. Can perfectly fit in bottles or wrap around crafts, window, plants, balcony, furniture, etc. The fairy lights wire parts are IP65 waterproof, you can even immerse the lights in water to achieve a different lighting effect. 【NOTE: cork part needs to keep dry.】